The morbid items in this small and hidden museum are not for the weak stomached.

The mysterious remains of a martyred teenage saint are venerated inside a small country chapel.

Seaside ruins of a settlement that date back to the first century B.C.

Single runway interrupted by a busy road that cuts across its middle.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

A once-secret library of Freemason history in Catalonia.

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

This cemetery features modernist statues as strange as its name.

This Funeral Hearse Museum represents the finest in cadaver transportation.

A somewhat mysterious biomedical museum housed inside a Spanish university.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

Earth's rocky history has rarely glittered so brightly as it does in this Spanish museum.

The lengthy skeleton of one of the tallest Spaniards of all time is on display in Madrid.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

One of the world's oldest universities houses an incredible collection of anatomical models, mummified body parts, and human bones.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Go inside to really appreciate this 500-year-old technological masterpiece.

Mountain where Jesus was first tempted by the Devil.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.